Rapco's most popular speaker cable, the R series uses bare copper stranded, twisted pair conductors – each individually jacketed with an overall round jacket added for durability. This commercial grade speaker cable is flexible and will stand the test of time. Available in 18, 16, 14, 12 and 10 gauge (18, 16, and 14 gauge listed in our Concert Series section) with 1/4 inch, banana, and speakon connectors.